A great reward that just ended on Amtrak was the 1800 Flowers 3x points promotion. You received 10 points for dollar spent before the triple bonus...so a dozen roses would cost about $50, and then you'd get 1500 points...halfway to a free ticket (in the Northeast).

When you consider that a roundtrip tix between PHL and WAS nets you between 280 and 400 points while spending between $74 & $125 each way...the $50 for 1500 points is a heck of a deal.

My girlfriend has received TONS of roses during this promotion!